Underwater micro-nano bubble generator and use method thereof

Abstract

The invention relates to the field of water pollution abatement, in particular to an underwater micro-nano bubble generator and a using method thereof.The underwater micro-nano bubble generator comprises a bubble cutting pipe, a bubble cutting generating device is arranged in the middle of the bubble cutting pipe, and an erecting fixing plate is arranged at the front end of the bubble cutting pipe; a plurality of first venturi tubes are arranged on the erected fixing plate, each first venturi tube comprises a first liquid inlet section, a first compression section and a first expansion section, a water passing pipe is connected between the first expansion section and the bubble cutting tube, and an air inlet which is the same as the interior of the first venturi tube is fixedly formed in the first venturi tube; and a second Venturi tube is fixedly mounted at the rear end of the bubble cutting tube, so that the problems that a micro-nano bubble generator in the prior art is relatively high in cost, water and gas cannot be preliminarily mixed before bubble cutting, and the damage resistance is poor can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water pollution treatment, in particular to an underwater micro-nano bubble generator and a method for using the same. BACKGROUND

[0002] The micro-nano bubble generator is a device for mixing water and gas to generate micro-nano bubbles, which can generate bubbles with a diameter of less than 100 μm. Such extremely small bubbles have many physical property advantages over ordinary bubbles. Micro-nano bubbles have the characteristics of slow rising speed and strong solubility, and due to the surface charge effect and the formation of the interface adsorption layer, the survival time of the micro-nano bubbles in water can be more than 72 hours.

[0003] There are several forms of working principles of the micro-nano bubble generator, mainly including the following forms: Pressurized container gas release method: the principle is to adjust the solubility of the gas in the liquid by changing the pressure, using pressurization and sudden pressure reduction, to realize the dissolution and release of the gas. In this process, larger bubbles are diluted into smaller bubbles to generate micro-nano bubbles.

[0004] Dispersed air method: the principle is to form a shear force by hydraulic shearing, high-speed cyclone, etc., to create extreme conditions, repeatedly shear and break the air, and mix it with water to generate a large number of fine bubbles.

[0005] Electrolysis method: the principle is to generate fine bubbles on the positive and negative electrode plates by electrolyzing water with electrodes.

[0006] Air float pump gas production method: the impeller air dispersion technology and pressure gas dissolution technology are combined to use. The high-speed rotating impeller generates negative pressure at the air inlet position and sucks in air. The air can be quickly dissolved in water by using the turbulent flow and high-pressure environment in the pump cavity.

[0007] In the specific implementation process, the pressurized container gas release method and the dispersed air method are often combined together for use to better generate micro-nano bubbles.

[0008] The traditional way of combining the two is to use an air pump to blow gas into the pipeline conveying the water body, then convey the mixed state of the gas and the water body to the instrument using the dispersed air method, and then convey the gas to the container using the pressurized container gas release method after shearing the air, so as to generate more micro-nano bubbles.

[0009] In the process of reusing the pressurized container method, a workpiece called a Venturi tube is often used, which transports the substance in a mixed state of water and gas from a space with a large cross section to a space with a small cross section, and then from the space with a small cross section to a space with a large cross section. The fluid velocity increases rapidly when the fluid is transported from the space with a large cross section to the space with a small cross section, and the fluid velocity decreases rapidly when the fluid is transported from the space with a small cross section to the space with a large cross section. Because the amount of water flowing through each cross section per unit time is the same in the same liquid conveying pipeline, when the water is transported from the space with a small cross section to the space with a large cross section, the large air bubbles are diluted into fine bubbles, thereby generating micro-nano bubbles.

[0010] Meanwhile, the Venturi tube also produces a Venturi effect, that is, the fluid increases when the fluid passes through the reduced flow cross section. According to Bernoulli's law, the increase in flow rate is accompanied by a decrease in fluid pressure. This effect is also known as the Venturi effect. The high-speed fluid generates a force that causes adsorption. The nanobubble generator is used in many fields, including water treatment. The nanobubble generator can form small bubbles in water, which have a large surface area and a small size, and can effectively interact with organic matter, heavy metal ions, bacteria, and other substances in water, thereby achieving water purification and treatment. The nanobubble generator can be used for sewage treatment, drinking water disinfection, and water quality improvement in aquaculture, which can greatly improve the purification efficiency and quality of water.

[0011] Traditional nanobubble generators require a gas pump to cooperate with them when inputting gas, and use a single pipe to input water. This increases the number of working instruments, increases the cost and damage probability, and makes the bubbles mixed unevenly in the water before the bubble generation. Once one of the water pipes is damaged, the water treatment work will be stopped, thereby affecting the work efficiency. SUMMARY

[0012] The underwater micro-nano bubble generator can solve the problems of high cost, inability to preliminarily mix water and gas before bubble cutting, and poor damage resistance of the micro-nano bubble generator in the prior art.

[0013] An underwater micro-nano bubble generator, comprising: a bubble cutting pipe, wherein a bubble cutting generating device is arranged at the middle position of the bubble cutting pipe; An erecting fixing plate is arranged at the front end of the bubble cutting pipe, and the erecting fixing plate is coaxial with the bubble cutting pipe. The first Venturi tube is uniformly distributed on the erection fixing plate, and comprises a first liquid inlet section, a first compression section and a first expansion section. The first expansion section is communicated with the bubble cutting tube through a water pipe; The air inlet is fixedly installed on the first Venturi tube and communicated with the position of the first compression section of the first Venturi tube. The second Venturi tube comprises a second liquid inlet section, a second compression section and a second expansion section. The second liquid inlet section of the second Venturi tube is fixedly connected with and communicated with the rear end of the bubble cutting tube.

[0014] In a further scheme, the erection fixing plate is a rectangular plate, and the first Venturi tube is fixedly connected with the erection fixing plate along the left-right direction.

[0015] In a further scheme, the erection fixing plate is a circular plate, and the first Venturi tube is uniformly distributed along the circumference of the erection fixing plate.

[0016] In a further scheme, the bubble cutting device comprises an intermediate fixed tube, which is fixedly erected at the intermediate position of the bubble cutting tube. The intermediate position of the intermediate fixed tube is uniformly provided with a cutting disc set along the front-rear direction. The cutting disc set is uniformly fixedly connected with cutting blades along the circumference thereof. The cutting blades are all inclined towards the same direction.

[0017] In a further scheme, the cutting disc set comprises a first cutting disc and a second cutting disc. The first cutting disc and the second cutting disc are alternately placed. The first cutting disc and the second cutting disc are both fixedly installed with a plurality of cutting blades along the circumference. The first cutting disc and the second cutting disc are rotationally connected. Part of the cutting blades on the first cutting disc are fixedly connected with the pipe wall of the bubble cutting tube. The front end of the bubble cutting tube is fixedly installed with a rotating boss. The rotating boss is rotationally connected with a driving wheel. The driving wheel is uniformly installed with driving blades along the circumference thereof. The rear position of the rotating boss is rotationally connected with a driving rod. The driving rod is fixedly connected with the second cutting disc. A speed change mechanism is arranged between the driving rod and the driving blades. The end of the cutting blade is sharpened.

[0018] In a further scheme, the speed change mechanism comprises an outer driving gear, an intermediate driving gear and an inner driving gear. The outer driving gear is fixedly connected with the driving wheel. The inner driving gear is coaxially fixedly connected with the driving rod. The intermediate driving gear is arranged between the outer driving gear and the inner driving gear. The intermediate driving gear is uniformly distributed with a plurality of intermediate driving gears along the circumference of the rotating boss. The intermediate driving gears are simultaneously engaged with the outer driving gear and the inner driving gear. The intermediate driving gears are rotationally connected with the rotating boss.

[0019] Further, the rotating boss is slidably connected to the front end of the driving wheel along the axial direction, and a stop disc is arranged on the front end of the rotating boss, and the stop disc and the driving wheel are provided with damping patches on opposite surfaces.

[0020] Further, the inner wall of the bubble cutting pipe is uniformly and fixedly provided with flow control air bags along the circumferential direction, and the front end and the rear end of the flow control air bag are formed in a smooth transition shape.

[0021] Further, the air inlet is in a C-shaped structure with the back end of the C-shaped structure being the opening, one end of the air inlet is connected to the outside through the first liquid inlet section of the first venturi tube, the other end of the air inlet extends to the first compression section of the first venturi tube, the one end of the air inlet extending to the first liquid inlet section is in a tapered shape, and the side surface of the air inlet at the position is uniformly provided with air holes.

[0022] The application also provides a method for using the underwater micro-nano bubble generator. S1: The water body is transported to the first venturi tube through the external water pipe, and in the process of passing through the first venturi tube, the cross-sectional area of the water body decreases when the water body enters the first compression section from the first liquid inlet section, and the flow rate of the water body gradually increases, according to the venturi effect, a negative pressure is generated at the transition between the first liquid inlet section and the first compression section, and in the case that the flow rate of the water body is relatively high, the air inlet can be connected to the outside through the pipeline, and due to the generation of the negative pressure of the first venturi tube, the air can be sucked into the first venturi tube through the air inlet; S2: After the air enters the first venturi tube, the air enters the first compression section, and then when the air enters the first expansion section from the first compression section, due to the sharp expansion of the cross-sectional area, the air bubbles are rapidly diluted, so that the air is preliminarily cracked, and the air is more easily dissolved in the water; S3: The mixed flow of the gas and the liquid enters the bubble cutting pipe, and the bubble cutting device in the bubble cutting pipe performs secondary cutting on the bubbles, so as to further increase the number of micro-nano bubbles. S4: The mixed flow of the gas and the liquid enters the second liquid inlet section of the second venturi tube, and the air repeats the process in the first venturi tube in the second venturi tube, and through the multiple generation of micro-nano bubbles, the efficient micro-nano bubble output efficiency is obtained.

[0023] Advantages: 1. In this invention, after air enters the first venturi tube, it enters the first compression section. Then, when it enters the first expansion section from the first compression section, the air bubbles rapidly dilute due to the rapid expansion of the cross-sectional area, thus initially refining the air and making it easier to dissolve in water. With the above technical solution, there is no need to use an external air pressure device to force the gas into the liquid, which reduces the cost of the equipment and the probability of damage. At the same time, by connecting multiple first venturi tubes to the bubble cutting tube, even if the pipeline or venturi tube on a certain line is damaged, it will not have a significant impact on the overall operation of the micro-nano bubble generator, thus improving the fault tolerance of the micro-nano bubble generator.

[0024] 2. When the water flow impacts the drive blades, all the drive blades will drive the drive wheel to rotate. When the drive wheel rotates, it drives the drive rod to rotate through the speed change mechanism. When the drive rod rotates, it drives the cutting disc that is fixedly connected to it to rotate. When the cutting disc rotates, it drives the cutting blades on it to rotate. The rotating cutting blades will produce a shearing effect with the adjacent stationary cutting blades, thereby cutting off the impurities wrapped on the cutting blades, thus preventing the accumulation of impurities on the cutting blades, and ensuring the normal operation of the micro-nano bubble generator.

[0025] 3. This invention installs a hydraulic push rod between the rotating boss and the stop plate. The hydraulic push rod pushes the stop plate to adhere to the drive wheel. The damping patch can effectively increase the friction. At this time, the drive wheel will stop rotating under the action of friction. When the water impacts the drive blade, it will generate circumferential motion. Since the contact area and the degree of torsion between the drive blade and the water are much larger than those of the cutting blade, the speed at which the drive blade causes the water to rotate is also much larger than the speed at which the cutting blade causes the water to rotate. This allows the cutting blade to cut the bubbles with higher intensity, thereby increasing the efficiency of generating micro-nano bubbles. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the first overall structure provided by the present invention; Figure 2 This is a schematic diagram of the second overall structure provided by the present invention; Figure 3 This is a schematic diagram of the internal structure of the bubble cutting tube and the second Venturi tube in this invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle; Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 6 It is a structural schematic diagram of the cutting disc in the application; Figure 7 It is a structural schematic diagram of the first Venturi tube in the application; Figure 8 It is a structural schematic diagram of the first cutting disc in the application; Figure 7 It is a local enlarged structural schematic diagram at C in the application; Figure 9 It is a schematic diagram of the connection relationship between the first cutting disc and the bubble cutting tube in the application.

[0027] Explanation of reference signs: 1, bubble cutting tube; 11, rotating boss; 12, driving wheel; 121, driving blade; 13, driving rod; 14, speed change mechanism; 141, outer driving gear; 142, intermediate driving gear; 143, inner driving gear; 15, stop disc; 16, damping patch; 2, bubble cutting generating device; 21, intermediate fixed tube; 22, cutting disc set; 221, cutting blade; 222, first cutting disc; 223, second cutting disc; 3, erecting fixed plate; 4, first Venturi tube; 41, first liquid inlet section; 42, first compression section; 43, first expansion section; 44, water passage; 45, air inlet; 5, second Venturi tube; 51, second liquid inlet section; 52, second compression section; 53, second expansion section; 6, flow control air bag. DETAILED DESCRIPTION

[0028] The specific embodiments of the application are described in detail below, but it should be understood that the protection scope of the application is not limited by the specific embodiments.

[0029] As shown in the specific embodiments of the application, a kind of underwater micro-nano bubble generator is provided, comprising: Figures 1 to 8 Bubble cutting tube 1, bubble cutting generating device 2 is arranged at the middle position of bubble cutting tube 1; Erecting fixed plate 3, erecting fixed plate 3 is arranged at the front end of bubble cutting tube 1, and erecting fixed plate 3 is coaxial with bubble cutting tube 1; First Venturi tube 4, a plurality of first Venturi tubes 4 are uniformly distributed on erecting fixed plate 3, first Venturi tube 4 includes first liquid inlet section 41, first compression section 42 and first expansion section 43, and water passage 44 is communicated between first expansion section 43 and bubble cutting tube 1; Air inlet 45, air inlet 45 is fixedly installed on first Venturi tube 4, and the position of first compression section 42 of first Venturi tube 4 is communicated; ​The second Venturi tube 5 comprises a second liquid inlet section 51, a second compression section 52 and a second expansion section 53, and the second liquid inlet section 51 of the second Venturi tube 5 is fixedly connected with the rear end of the bubble cutting tube 1 and communicates with the rear end of the bubble cutting tube 1.

[0030] It should be noted that in the process of producing bubbles by the micro-nano bubble generator, the water body is transported to the first Venturi tube 4 through the external water pipe, and in the process of passing through the first Venturi tube 4, the cross-sectional area of the water body decreases in the process of entering the first compression section 42 from the first liquid inlet section 41, and the flow rate of the water body gradually increases. According to the Venturi effect, a negative pressure is generated at the transition between the first liquid inlet section 41 and the first compression section 42. In the case of a high flow rate of the water body, a vacuum-like environment is generated. The air inlet 45 can be connected to the outside through a pipeline. Due to the generation of negative pressure in the first Venturi tube 4, air can be sucked into the first Venturi tube 4 through the air inlet 45. In this process, the air inlet 45 can also be connected to a tank storing a gas with strong oxidizing property or disinfection capability through a pipeline, such as a tank storing Cl2, ClO2 and O3, so as to achieve the purposes of disinfection and removal of organic pollutants by using strong oxidizing property. After the air enters the first Venturi tube 4, it enters the first compression section 42. Then, due to the sharp expansion of the cross-sectional area, the air bubbles are rapidly broken when the air enters the first expansion section 43 from the first compression section 42, so that the air is preliminarily refined and is more easily dissolved in water. Through the above technical solution, it is not necessary to press the gas into the liquid by using an external air pressure device, which reduces the cost of working instruments and the probability of damage. At the same time, by connecting multiple first Venturi tubes 4 to the bubble cutting tube 1, if the pipeline or the Venturi tube on a certain line is damaged, it will not have a great impact on the overall working process of the micro-nano bubble generator. Then, the mixed flow of the gas and the liquid enters the bubble cutting tube 1. In the bubble cutting tube 1, the bubble cutting device 2 further divides the bubbles, so as to further increase the number of micro-nano bubbles and improve the efficiency of micro-nano bubble generation. Then, the mixed flow enters the second liquid inlet section 51 of the second Venturi tube 5. The air in the second Venturi tube 5 repeats the process of the first Venturi tube 4. Through the above-mentioned three-stage micro-nano bubble generation method, the efficiency of micro-nano bubble generation is higher than that of the traditional micro-nano bubble generation method.

[0031] As shown in Figure 1 The erection fixing plate 3 is a rectangular plate, and the first Venturi tubes 4 are fixedly connected to the erection fixing plate 3 in the left-right direction.

[0032] It should be noted that in some water environment, there are often high width but shallow depth environment, through the above design can make the underwater micro-nano bubble generator as a whole flat, so as to facilitate the installation in the above environment.

[0033] As shown in Figure 2 , the erection fixed plate 3 is a circular plate, and the first Venturi tube 4 is uniformly distributed along the circumference of the erection fixed plate 3.

[0034] It should be noted that in some water environment, there are often some narrow width but with a certain depth environment, by the erection of fixed plate 3 processing into a disc to adapt to the above environment, but also can be installed in the erection of fixed plate 3 water outlet position, using the potential energy of water body can be completed into the first Venturi tube 4 of water body.

[0035] As shown in Figure 3 , Figure 4 , Figure 5 and Figure 6 , the bubble cutting device 2 includes an intermediate fixed pipe 21, the intermediate fixed pipe 21 is fixed in the middle position of the bubble cutting pipe 1, the intermediate fixed pipe 21 is uniformly provided with cutting disc group 22 in the middle position along the front and back direction, the cutting disc group 22 is uniformly fixed with cutting blade 221 along the circumference, the cutting blade 221 is inclined to the same direction.

[0036] It should be noted that in the process of cutting bubbles by bubble cutting device 2 to produce micro-nano bubbles, the water flow carrying gas will impact the cutting blade 221 on the cutting disc group 22, and the cutting blade 221 will cut the bubbles in the water body, so as to produce dense micro-nano bubbles, and because the cutting blade 221 is inclined as a whole, when the water body impacts on the cutting blade 221, the water body will be subjected to the force along the circumference of the bubble cutting pipe 1 under the constraint of the bubble cutting pipe 1, so as to make the water body rotate, and after the water body rotates, the number of times of cutting of the bubbles in the water body by the cutting blade 221 will greatly increase, thereby greatly improving the efficiency of micro-nano bubble generation, and the setting of multiple cutting disc groups 22 makes it convenient to replace the blades on one cutting disc group 22, thereby reducing the cost.

[0037] As shown in Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9As shown, the cutting disc set 22 includes a first cutting disc 222 and a second cutting disc 223, the first cutting disc 222 and the second cutting disc 223 are alternately placed, the first cutting disc 222 and the second cutting disc 223 are both circumferentially uniformly fixedly installed with a plurality of cutting blades 221, and the first cutting disc 222 and the second cutting disc 223 are rotationally connected, part of the cutting blades 221 on the first cutting disc 222 are fixedly connected to the pipe wall of the bubble cutting pipe 1, the front end of the bubble cutting pipe 1 is fixedly installed with a rotating boss 11, the rotating boss 11 is rotationally connected with a driving wheel 12, the driving wheel 12 is uniformly installed with driving blades 121 along the circumference thereof, the rotating boss 11 is rotationally connected with a driving rod 13 at a position rearward of the rotating boss 11, the driving rod 13 is fixedly connected with the second cutting disc 223, a speed change mechanism 14 is arranged between the driving rod 13 and the driving blades 121, and the distal end of the cutting blade 221 is processed into a sharp shape.

[0038] It should be noted that in the process of treating the water body by the underwater micro-nano bubble generator, it is difficult to find clean water sources to generate micro-nano bubbles under various conditions, so it is necessary to take the local water source to generate micro-nano bubbles, but in this process, impurities in the water body will inevitably enter the micro-nano bubble generator, although some preliminary means such as filter screen can be used to filter the water body, but some small or small-diameter substances such as plant fibers will still enter the micro-nano bubble generator, when these substances enter the bubble cutting pipe 1, they are easy to wind around the cutting blades 221, in order to improve the efficiency of generating micro-nano bubbles, the cutting blades 221 are often made very dense, in order to reduce the influence of these impurities, when the water flow impacts the driving blades 121, all the driving blades 121 will drive the rotation of the driving wheel 12, the driving wheel 12 drives the rotation of the driving rod 13 through the speed change mechanism 14 during rotation, the driving rod 13 drives the rotation of the second cutting disc 223 fixedly connected thereto during rotation, the second cutting disc 223 drives the rotation of the cutting blades 221 thereon during rotation, the rotating cutting blades 221 will produce a shearing effect with the adjacent stationary cutting blades 221, thereby cutting the impurities wound around the cutting blades 221, thereby avoiding the accumulation of impurities on the cutting blades 221, thereby affecting the normal work of the micro-nano bubble generator.

[0039] As Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the variable speed mechanism 14 includes an outer drive gear 141, an intermediate drive gear 142 and an inner drive gear 143, the outer drive gear 141 is fixedly connected with the drive wheel 12, the inner drive gear 143 is coaxially fixedly connected with the drive rod 13, a plurality of intermediate drive gears 142 are uniformly distributed along the circumference of the rotating boss 11 between the outer drive gear 141 and the inner drive gear 143, the intermediate drive gears 142 are simultaneously engaged with the outer drive gear 141 and the inner drive gear 143, and the intermediate drive gears 142 are rotatably connected with the rotating boss 11.

[0040] It should be noted that in the process of driving the drive rod 13 to rotate by the variable speed mechanism 14, the drive wheel 12 drives the outer drive gear 141 fixedly connected therewith to rotate, the outer drive gear 141 engages with the intermediate drive gear 142 to drive the intermediate drive gear 142 to rotate, the intermediate drive gear 142 and the inner drive gear 143 are engaged to drive the inner drive gear 143 to rotate, and the inner drive gear 143 drives the cutting disc set 22 fixedly connected therewith to rotate. In this process, since the diameter of the outer drive gear 141 is significantly larger than that of the inner drive gear 143, the rotational speed of the second cutting disc 223 is significantly higher than that of the drive wheel 12, so that the cutting blades 221 on the second cutting disc 223 have a higher rotational speed, thereby improving the cutting effect.

[0041] As shown in Figure 3 and Figure 4 , the rotating boss 11 is slidably connected with a stop disc 15 at the front end of the drive wheel 12 along the axial direction, and the stop disc 15 and the drive wheel 12 are provided with damping patches 16 made of rubber on opposite sides.

[0042] A hydraulic push rod can be installed between the rotating boss 11 and the stop disc 15, the stop disc 15 is pushed to tightly contact the drive wheel 12 by the hydraulic push rod, and the damping patches 16 can effectively increase the friction. At this time, the drive wheel 12 will stop rotating under the action of friction, and when the water hits the driving blades 121, it will produce a circumferential movement. Since the contact area and the degree of torsion of the driving blades 121 are much larger than those of the cutting blades 221, the rotational speed of the water caused by the driving blades 121 is much higher than that of the cutting blades 221. Therefore, the cutting blades 221 can cut the bubbles with higher intensity, thereby improving the efficiency of generating micro-nano bubbles.

[0043] As shown in Figure 3 and Figure 5 , the inner wall of the bubble cutting pipe 1 is uniformly fixedly installed with flow control air bags 6 along the circumference, and the front and rear ends of the flow control air bags 6 are formed in a smooth transition structure.

[0044] Need to explain, by injecting different volume of high pressure gas into the flow control air bag 6, the volume of the flow control air bag 6 will also change, so the cross-sectional area of the gas bubble cutting pipe 1 can be provided for fluid to pass will also change, thereby regulating the flow rate of the mixture of gas and liquid, so as to regulate the intensity of the cutting bubble.

[0045] As shown in Figure 7 And Figure 8 The air inlet 45 is a whole C-shaped back to the rear, one end of the air inlet 45 passes through the first liquid inlet section 41 of the first venturi 4 and is connected with the outside, the other end of the air inlet 45 extends to the first compression section 42 of the first venturi 4, and the end of the air inlet 45 extending to the first liquid inlet section 41 is tapered, and the side of the air inlet 45 at this position is uniformly processed with air holes.

[0046] Need to explain, when the gas enters the first venturi 4 from the air inlet 45, due to the negative pressure generated by the first venturi 4 at the position of the first compression section 42, the gas will enter the first compression section 42 from the position of the air inlet 45 inside the first venturi 4, and the air holes processed at the side of the air inlet 45 can generate more suction at the position of the air inlet 45 inside the first venturi 4, thereby improving the efficiency of air intake.

[0047] In addition, the application also provides a kind of underwater micro-nano bubble generator use method, comprising the following steps: S1: water will be transported to the first venturi 4 by the water pipe connected outside, in the process of passing through the first venturi 4, in the process of entering the first compression section 42 from the first liquid inlet section 41, the cross-sectional area decreases, the flow rate of water gradually increases, according to the venturi effect, negative pressure will be generated at the transition of the first liquid inlet section 41 and the first compression section 42, under the condition that the flow rate of water is fast, the air inlet 45 can be connected with the outside through pipeline, due to the generation of negative pressure of the first venturi 4, air can be sucked into the first venturi 4 through the air inlet 45; S2: after entering the first venturi 4, the air will enter the first compression section 42, and then when entering the first expansion section 43 from the first compression section 42, due to the sharp expansion of the cross-sectional area, the air bubbles will be rapidly diluted, so that the air is preliminarily cracked, which makes it easier to dissolve in water; S3: the mixed flow of gas and liquid will enter the bubble cutting pipe 1, in the bubble cutting pipe 1, the bubble cutting device 2 will cut the bubbles twice, so as to further increase the number of micro-nano bubbles; S4: The mixed flow of gas and liquid will enter the second liquid inlet section 51 of the second venturi 5, and the air repeats the process of the first venturi 4 in the second venturi 5, and through multiple micro-nano bubble generation, high-efficiency micro-nano bubble output efficiency is obtained.

[0048] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation and a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the present application. In addition, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0049] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0050] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made in the scope of the present application should still belong to the scope of the present application.

Claims

1. An underwater micro / nano bubble generator, characterized in that, include: A bubble cutting tube (1) is provided with a bubble cutting generator (2) at the middle position of the bubble cutting tube (1); A fixing plate (3) is installed at the front end of the bubble cutting tube (1), and the fixing plate (3) is coaxial with the bubble cutting tube (1). The first Venturi tube (4) is evenly distributed on the mounting plate (3). The first Venturi tube (4) includes a first liquid inlet section (41), a first compression section (42) and a first expansion section (43). A water pipe (44) is connected between the first expansion section (43) and the bubble cutting tube (1). Air inlet (45), the air inlet (45) is fixedly installed on the first venturi tube (4) and communicates with the position of the first compression section (42) of the first venturi tube (4); The second venturi tube (5) includes a second inlet section (51), a second compression section (52), and a second expansion section (53). The second inlet section (51) of the second venturi tube (5) is fixedly connected to and communicates with the rear end of the bubble cutting tube (1).

2. The underwater micro / nano bubble generator according to claim 1, characterized in that, The mounting plate (3) is a rectangular plate, and a first Venturi tube (4) is evenly fixedly connected to the mounting plate (3) along the left and right directions.

3. The underwater micro / nano bubble generator according to claim 1, characterized in that, The mounting plate (3) is a circular plate, and the first venturi tube (4) is evenly distributed along the circumference of the mounting plate (3).

4. The underwater micro / nano bubble generator according to claim 3, characterized in that, The bubble cutting device (2) includes a middle fixing tube (21), which is fixedly mounted in the middle position of the bubble cutting tube (1). A cutting disc assembly (22) is evenly arranged in the front-back direction in the middle position of the middle fixing tube (21). Cutting blades (221) are evenly fixedly connected in the circumference of the cutting disc assembly (22), and the cutting blades (221) are all inclined in the same direction.

5. An underwater micro / nano bubble generator according to claim 4, characterized in that, The cutting disc assembly (22) includes a first cutting disc (222) and a second cutting disc (223). The first cutting disc (222) and the second cutting disc (223) are placed alternately. Multiple cutting blades (221) are uniformly fixedly installed on both the first cutting disc (222) and the second cutting disc (223) in a circumferential direction. The first cutting disc (222) and the second cutting disc (223) are rotatably connected. Some of the cutting blades (221) on the first cutting disc (222) are fixedly connected to the wall of the bubble cutting tube (1). A rotating boss (11) is fixedly installed at the front end of the tube (1). A drive wheel (12) is rotatably connected to the rotating boss (11). Drive blades (121) are evenly installed on the drive wheel (12) along its circumference. A drive rod (13) is rotatably connected to the rear of the rotating boss (11). The drive rod (13) is fixedly connected to the second cutting disc (223). A speed change mechanism (14) is provided between the drive rod (13) and the drive blades (121). The end of the cutting blades (221) is processed into a sharp shape.

6. The underwater micro / nano bubble generator according to claim 5, characterized in that, The transmission mechanism (14) includes an outer drive gear (141), an intermediate drive gear (142), and an inner drive gear (143). The outer drive gear (141) is fixedly connected to the drive wheel (12), and the inner drive gear (143) is coaxially fixedly connected to the drive rod (13). An intermediate drive gear (142) is provided between the outer drive gear (141) and the inner drive gear (143). Multiple intermediate drive gears (142) are evenly distributed along the circumference of the rotating boss (11). The intermediate drive gears (142) mesh with both the outer drive gear (141) and the inner drive gear (143), and the intermediate drive gears (142) are rotatably connected to the rotating boss (11).

7. An underwater micro / nano bubble generator according to claim 5, characterized in that, The rotating boss (11) is slidably connected to a stop plate (15) along its axial direction at the front end of the drive wheel (12). The stop plate (15) and the opposite side of the drive wheel (12) are both equipped with damping patches (16).

8. An underwater micro / nano bubble generator according to any one of claims 4 to 7, characterized in that, The inner wall of the bubble cutting tube (1) is uniformly fixed with a flow control airbag (6) along its circumference, and the front and rear ends of the flow control airbag (6) are processed into a smooth transition shape.

9. An underwater micro / nano bubble generator according to claim 1, characterized in that, The air inlet (45) is C-shaped with the back opening facing backward. One end of the air inlet (45) passes through the first liquid inlet section (41) of the first venturi tube (4) and is connected to the outside. The other end of the air inlet (45) extends into the first compression section (42) of the first venturi tube (4). The end of the air inlet (45) extending into the first liquid inlet section (41) is conical, and the side of the air inlet (45) at this position is uniformly machined with air holes.

10. A method of using an underwater micro / nano bubble generator, characterized in that, The underwater micro / nano bubble generator applied to any one of claims 1-9 comprises the following steps: S1: The water body will be transported to the first Venturi tube (4) through the external water pipe. During the process of the water body passing through the first Venturi tube (4), the cross-sectional area of ​​the water body decreases as it enters the first compression section (42) from the first liquid inlet section (41), and the flow rate of the water body gradually increases. According to the Venturi effect, a negative pressure will be generated at the transition between the first liquid inlet section (41) and the first compression section (42). When the water body flow rate is relatively fast, the air inlet (45) can be connected to the outside through the pipe. Due to the generation of negative pressure in the first Venturi tube (4), air can be drawn into the first Venturi tube (4) through the air inlet (45). S2: After the air enters the first venturi tube (4), it will enter the first compression section (42). Then, when it enters the first expansion section (43) from the first compression section (42), the air bubbles will be rapidly diluted due to the rapid expansion of the cross-sectional area, so that the air is initially broken down and made easier to dissolve in water. S3: The mixture of gas and liquid flows into the bubble cutting tube (1). In the bubble cutting tube (1), the bubble cutting generator (2) will split the bubbles a second time, thereby further increasing the number of micro and nano bubbles generated. S4: The mixture of gas and liquid flows into the second liquid inlet section (51) of the second Venturi tube (5). Air repeats the process of the first Venturi tube (4) in the second Venturi tube (5). By generating micro-nano bubbles multiple times, a high efficiency of micro-nano bubble production is achieved.

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